ask for some extension libs of opengl...

I would like to know whether there are some “good” extension libs? I mean the liberary should use conveniently and support as many as extensions(not too limited)…
My VGA is nVidia that support opengl 1.5 and my OS is windowsxp.
Can someone give me some advice? Thanks in advance

The extensions are included in the driver OpenGl libs however to use them you want to include glext.h from your SDK or some other downloaded source and perform appropriate queries.

There are extension loading libs that make this easier, for example

http://cosoft.org.cn/projects/glloader